Roger Weller, geology instructor
firstname.lastname@example.org copyright 2010-R.Weller
An emerald is simply a nice green beryl, preferably transparent. The green color
comes from the presence of chromium within the crystal structure. This specimen
has an interesting story. It is only about one inch across and was found in a box
of mixed rocks purchased at a swap meet for $10. It pays to know what you are
Photo is copyright free only for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.